John Gray assesses what's going wrong for liberals in the US election. 'It's not chiefly Joe Biden's alleged faltering mental powers that lie behind Trump's march to the White House', John writes. 'Far more, it's the evident inability of American liberals to learn from their mistakes.' And he believes they are displaying a 'reckless hubris' for which they risk being severely punished come November. Producer: Adele Armstrong Sound: Peter Bosher Production coordinator: Liam Morrey Editor: Richard Fenton-Smith